[S390] use compiler builtin versions of strlen/strcpy/strcat

[linux-block.git] / arch / s390 / include / asm / string.h

diff --git a/arch/s390/include/asm/string.h b/arch/s390/include/asm/string.h
index adf079170aa605f373510041dec12a16ca24223a..cd0241db5a4688b754d6838497cfc06768b4025e 100644 (file)
--- a/arch/s390/include/asm/string.h
+++ b/arch/s390/include/asm/string.h
@@ -100,6 +100,7 @@ static inline char *strcat(char *dst, const char *src)
 
 static inline char *strcpy(char *dst, const char *src)
 {
+#if __GNUC__ < 4
        register int r0 asm("0") = 0;
        char *ret = dst;
 
@@ -109,10 +110,14 @@ static inline char *strcpy(char *dst, const char *src)
                : "+&a" (dst), "+&a" (src) : "d" (r0)
                : "cc", "memory");
        return ret;
+#else
+       return __builtin_strcpy(dst, src);
+#endif
 }
 
 static inline size_t strlen(const char *s)
 {
+#if __GNUC__ < 4
        register unsigned long r0 asm("0") = 0;
        const char *tmp = s;
 
@@ -121,6 +126,9 @@ static inline size_t strlen(const char *s)
                "       jo      0b"
                : "+d" (r0), "+a" (tmp) :  : "cc");
        return r0 - (unsigned long) s;
+#else
+       return __builtin_strlen(s);
+#endif
 }
 
 static inline size_t strnlen(const char * s, size_t n)